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A novel AH-D-A-type phase junction material to improve photovoltaic performance and device stability in fullerene OSCs

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Chinese Chemical Letters 2020年第9期31卷 2452-2458页

作者： Lin Shao Fei Tong Mengbing Zhu Hao Xia Wenhong Peng Hua Tan Bin Zhang Yu Liu Weiguo Zhu College of Chemistry Xiangtan UniversityXiangtan 411105China School of materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsNational Experimental Demonstration Center for Materials Science and EngineeringChangzhou UniversityChangzhou 213164China

In order to boost power conversion efficiency(PCE) and operation stability of organic solar cells(OSCs),we propose a new idea of phase junction materials(PJMs) used as a photoactive layer component to improve device performance and *** this purpose,a novel PJM of H-TRC8 based on rhodanine unit was designed with a conjugated AH-D-A ***,AH is a hydrogen-donating electron acceptor unit,D-A is an electron donor-acceptor *** is found that H-TRC8 has a good carriertransporting ability,as well as definite hydrogen-bond and D-A interaction with donor/acceptor *** H-TRC8 is added into the PBDB-T/PC60BM blend film with 1.0 vol% DIO(1,8-diiodooctane),the resulting blend film exhibited an enhanced absorption and improved *** intermolecular hydrogen bond between H-TRC8 and PBDB-T plays an important role for them,which is confirmed via FT-IR spectra and 2D 1H *** a result,the PBDB-T/PC60BM-based devices with 1.25 wt%H-TRC8 and 1.0 vol% DIO exhibit a significantly improved PCE of 8.06%,which is increased by 20.6% in comparison to that in the binary devices with 1.0 vol% DIO only(PCE=6.68%).Furthermore,the device stability is significantly enhanced with only 43% PCE roll-off at 150℃ for 120 *** work indicates that AH-D-A-type PJMs are promising photovoltaic materials used as photoactive-layer components to achieve high-performance fullerene OSCs with high device stability.

关键词： phase junction material A_H-D-A H-bond H-TRC8 Performance and stability

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